Pantry shelving is not designed to function as eye candy only. Its primary purpose is to put things in their proper place so that one can work with ease. If the kitchen pantry remains disorganized, one can be sure this purpose is defeated - and chaos can be expected.
Not all shelving is meant to be designed as corner shelving. It would be impractical for a book case to be made in the corner shelving design, because there would be valuable shelf space that could not be used to store books because of the angle of the back side of the shelves. A china cabinet or hutch would pose the same design problem.
It is highly unlikely that you will have to acquire a building permit for this type of project, unless you decide to do any kind of plumbing or electrical wiring. When in doubt, be sure to check your city's building codes.
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